Instructions And Patient Preparation
- Instructions
- • Contrast is used for assessment of the blood-brain barrier, infection, tumor, and some stroke evaluation
• T2* GRE susceptibility sequence used for trauma, evaluation for blood, and seizure cases
• Perfusion sequence is optional in stroke or tumor cases - Position
- Supine, head first
- Coil
- Head, HNU (Head 24 selected if possible)
- Landmark
- Glabella or chin
Contrast Agent Parameters
| Contrast Agent | Dose | Injection Rate | Dose Timing Method and Scan Delay | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gadopiclenol (VUEWAY) | 0.1 mmol/kg up to a calculated volume of 15 mL | Power inject perfusion at 4 mL/sec | Start scan and inject contrast after 20 sec of scanning | |||||||||
| Saline Flush | 10-20 mL | — | — | |||||||||
| Comments | • Report agent administered and dose • Consider MPR 3 mm recons of all 3D sequences in all non-acquired planes |
|||||||||||
Imaging Parameters
| Scan Description | 3PL LOCALIZER |
SAGITTAL T1 FLAIR |
AXIAL T2 FS FSE |
AXIAL T1 3D BRAVO |
AXIAL DWI |
AXIAL T2* GRE |
AXIAL DSC PWI |
Post SAGITTAL T2 FLAIR CUBE |
Post AXIAL T1 3D BRAVO |
Post CORONAL T1 3D CUBE |
Optional: SAGITTAL T2 3D CUBE |
Optional: AXIAL T2* SWAN |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| View Image | View Image | View Image | View Image | View Image | ||||||||
| Primary Sequence | Yes | Yes | Yes | Yes | Yes | Yes | Optional | Yes | Yes | Yes T1 | Alternative T2 |
Alternative 3D T2* |
| Mode | 2D | 2D | 2D | 3D BRAVO | 2D | 2D | 2D | 3D | 3D BRAVO | 3D | 3D | 3D |
| Pulse Sequence | SSFSE | IR | FRFSE-XL | BRAVO | SE-EPI | GRE | GRE EPI | CUBE | BRAVO | CUBE | CUBE | GRE |
| Imaging Options | SEQ, EDR, FAST, SS, ARC, TRF |
FC, TRF, SEQ, FAST |
FC, TRF | FAST, IRP, ZIP2, ASSET |
EPI, DIFF, ASSET | FC | ASSET, EPI, MPH | ARC, T2-IRP, ZIP2, EDR |
FAST, IRP, ZIP2, ASSET |
EDR, ZIP2, ZIP512, FR, ARC |
EDR, FAST, FR, ZIP2, ARC | FC, ASSET, ZIP2, FAST |
Scan Parameters
| Scan Description | 3PL LOCALIZER |
SAGITTAL T1 FLAIR |
AXIAL T2 FS FSE |
AXIAL T1 3D BRAVO |
AXIAL DWI |
AXIAL T2* GRE |
AXIAL DSC PWI |
Post SAGITTAL T2 FLAIR CUBE |
Post AXIAL T1 3D BRAVO |
Post CORONAL T1 3D CUBE |
Optional: SAGITTAL T2 3D CUBE |
Optional: AXIAL T2* SWAN |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TE | 80 | 24 | 80 | ― | Min | 25 | 30 | Fixed with TR | ― | 24 | 82 | 44 |
| TR | 1000 | 3500 | 3500-4250 | ― | 9000 | 800 | 1500 | 6000 | ― | 550 | 2500 | ― |
| TI | ― | Auto | ― | 450 | ― | ― | ― | 1954 (Fixed with TR) |
450 | ― | ― | ― |
| Flip Angle | ― | Auto | Auto | 13 | ― | 20 | 30 | Auto | 13 | ― | ― | 15 |
| ETL | ― | 8 | 19 | ― | ― | ― | ― | 160 | ― | 24 | 100 | ― |
| Bandwidth | 83 | 41 | 41 | 25 | 125 | 31 | Default | 32 | 25 | 62 | 62 | 62 |
| Sat | ― | ― | Fat | ― | ― | ― | ― | Fat | ― | Fat | ― | ― |
Acquisition Parameters
| Scan Description | 3PL LOCALIZER |
SAGITTAL T1 FLAIR |
AXIAL T2 FS FSE |
AXIAL T1 3D BRAVO |
AXIAL DWI |
AXIAL T2* GRE |
AXIAL DSC PWI |
Post SAGITTAL T2 FLAIR CUBE |
Post AXIAL T1 3D BRAVO |
Post CORONAL T1 3D CUBE |
Optional: SAGITTAL T2 3D CUBE |
Optional: AXIAL T2* SWAN |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MATRIX freq | 256 | 352 | 384 | 256 | 128 | 320 | 96 | 256 | 256 | 256 | 320 | 288 |
| MATRIX phase | 192 | 224 | 256 | 256 | 128 | 256 | 96 | 256 | 256 | 256 | 320 | 224 |
| NEX | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 160 |
| Phase FOV | 1 | 1 | 0.75 | ― | 1 | 0.75 | 1 | ― | ― | .8 | 1 | 1 |
| Freq Direction | Unswap | S/I | A/P | A/P | R/L | A/P | R/L | S/I | A/P | S/I | S/I | 1 |
| Image Enhance | ― | PURE | PURE | PURE | PURE | PURE | PURE | PURE | PURE | PURE | PURE | PURE |
| FC Direction | ― | ― | Slice | ― | ― | Slice | ― | ― | ― | ― | ― | ― |
| User CV | ― | CV12 1 CV22 1 |
― | ACC=2 | DIFF Dir-All #T2 images 1 Nex 1 for T2 B1000/1 Nex OPT TE On Dual SE On ACC=2 Ramp Samp 1 Recon 1 Grad OPT 1 |
― | 1 Shot 75 ph/loc Inter Delay Min ACC=2 Ramp Samp On Phase Correct On |
ACC=2 SL=2 |
ACC=2 | CUBE Enh 3 ACC=2 |
ACC=2 OPT HS 1.2 |
Phase Images ACC=2 |
Scanning Range
| Scan Description | 3PL LOCALIZER |
SAGITTAL T1 FLAIR |
AXIAL T2 FS FSE |
AXIAL T1 3D BRAVO |
AXIAL DWI |
AXIAL T2* GRE |
AXIAL DSC PWI |
Post SAGITTAL T2 FLAIR CUBE |
Post AXIAL T1 3D BRAVO |
Post CORONAL T1 3D CUBE |
Optional: SAGITTAL T2 3D CUBE |
Optional: AXIAL T2* SWAN |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FOV | 30 | 24 | 22 | 25 | 24 | 22 | 22 | 25 | 25 | 24 | 25 | 22 |
| Slice Thickness | 7 | 3 | 4 | 2.4 | 5 | 5 | 6 | 1.6 | 1.2 | 1 | 1.6 | 3 |
| Spacing | 5 | 1 | 1 | ― | 1 | .5 | 1 | ― | ― | ― | ― | ― |
| Number of Slices | 7-Ax/Sag/Cor | ― | 24-26 | 70 | 24-26 | 24-26 | 16 | 126 | 140 | 200 | 112 | 24-26 |
| Scan Time | 0:18 sec | 2-3 min | ~2-3 min | 2:30 min | 0:50 sec | 2 min | 1:53 min | 3-5 min | 4 min | 3-5 min | 3-5 min | 3-5 min |
